Process for the manufacture of flour



(No Model.)

F. PRINZ.

PROCESS FOR THE MANUPAGTURB 0F PLOUR.

No. 267,016./ )lqgetgq Nov. 7,1882.

I IIIIIIII f/l A F 61A I I I l I i l llAlll... l l l l IA l l 1 ll/ gjm UNITED STATES PATENT OEEICE.

FAUSTIN PRINZ, OF ST. PAUL, MINNESOTA.

PROCESS FOR THE MANUFACTURE OF FLOUR.

SPECIFICATION forming part of Letters Patent No. 267,016, dated November '7, 1882.

` Application filed December 16, 1881. (No model.)

4 'cilically defined by the claims.

For the purpose of illustrating` this process I have shown in Figure l in the drawings an outline representation of the rolls and bolts as used in a gradual-reduction mill where four (4) reductions are made, and in Fig. 2 an outline-section of a portion of a pair of rolls having the smooth surface.

In the gradual-reduction process the Wheat passes from the bin A tothe rst set of rolls, B, through which it passes and is merely vcracked or split to permit the germ and some `loose middlings and bran to escape, and the product carried, Vas indicated by dotted lines a, to the iirst scalping-reel, O, ,to separate the germ, coarser middlings, and. bran,` and the coarser particles, consisting of the loose germ, middlings, and bran, carried to'an'aspirator, while the tailings (bywhichI meantheclean cracked wheat and coarse middlin-gs, separated from the dust, tine middlings, and' bran) are returned to the second set of rolls, 1) as indicated by dotted lines b, and so on through the remaining rolls, E F, and bolts G H I, asindicated by dotted lines c 0l e, all the said rolls, after the first set, being uted or furrowed, as

heretofore.

Y power.

ductions, so that a less number of rolls will be required to produce the same grades of our than in the old method. The smooth rolls also require less power to drive them than the scratched7 or tinted rolls, and as the first reduction always requires more power than the after reductions I can thus do the same work with less power or more work with the same Any number of sets of rolls may be used; butI have found b y experiment that with my process four (4) sets of rolls will do the work of tive (5) in the furrowed form. After the cracked wheat leaves the-rolls B, and before it is passed through the scalping-reel C it may be passed through a brushing-machine, K, to more thoroughly separate the loosened particles, if desired.

What I claim as new is- 1. The process herein described for reducing wheat to our, consisting in first cracking the Wheat by passing it betweensmooth-surfaced rolls set far enough apart to merely crack the wheat without crushing the germ; secondly, in separating the germ, coarser middlings, and bran by passing the product of the first sten through suitable bolts or screens; and, thirdly, in cracking or crushing the cleaned wheat and coarse middlings of the second step by passing them between corrugated rolls, as set forth.

2. The process herein described for reducing Wheat to our, consisting, first, in cracking the wheat by passing it between smooth-surfaced rolls set far enough apart to merely crack the wheat without crushing the germ or cutting the bran next, in separating the germ, coarse middlings, and bran by passing the product ofthe lirst step througha brushing or rubbing machine, and afterward through suitable bolts or screens, and then cracking the cleaned wheat and coarse middlings of the second step by passing them between corrugated rolls, as set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

FAUSTIN PRINZ.

Witnesses C. N. WooDWARn, EDWARD Rorrnnfr. 

